Misunderstandings are the bread and butter of this genre.
The "thank me later" part suggests this is a recommendation for a specific title, likely the manga or anime series (also known as Sleeping Over with a Relative's Child or O-tomari ). Essay: The Complex Dynamics of "Shinseki no Ko to Otomari" shinseki no ko to wo tomaridakara thank me later
The text from my mom was short and terrifying: "Your aunt’s son, Haru, is staying at your place for the week while his internship starts. I already gave him the spare key. Thank me later!" Misunderstandings are the bread and butter of this genre
If you want to create a similar phrase: